/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.epro.dx.pullview.internal;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Matrix;
import android.graphics.drawable.Drawable;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView.ScaleType;

import com.epro.dx.R;
import com.epro.dx.pullview.PullToRefreshBase.Mode;
import com.epro.dx.pullview.PullToRefreshBase.Orientation;

public class RotateLoadingLayout extends LoadingLayout
{
    
    static final int ROTATION_ANIMATION_DURATION = 1200;
    
    private final Animation mRotateAnimation;
    
    private final Matrix mHeaderImageMatrix;
    
    private float mRotationPivotX, mRotationPivotY;
    
    private final boolean mRotateDrawableWhilePulling;
    
    public RotateLoadingLayout(Context context, Mode mode, Orientation scrollDirection, TypedArray attrs)
    {
        super(context, mode, scrollDirection, attrs);
        
        mRotateDrawableWhilePulling = attrs.getBoolean(R.styleable.PullToRefresh_ptrRotateDrawableWhilePulling, true);
        
        mHeaderImage.setScaleType(ScaleType.MATRIX);
        mHeaderImageMatrix = new Matrix();
        mHeaderImage.setImageMatrix(mHeaderImageMatrix);
        
        mRotateAnimation =
            new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        mRotateAnimation.setInterpolator(ANIMATION_INTERPOLATOR);
        mRotateAnimation.setDuration(ROTATION_ANIMATION_DURATION);
        mRotateAnimation.setRepeatCount(Animation.INFINITE);
        mRotateAnimation.setRepeatMode(Animation.RESTART);
    }
    
    public void onLoadingDrawableSet(Drawable imageDrawable)
    {
        if (null != imageDrawable)
        {
            mRotationPivotX = Math.round(imageDrawable.getIntrinsicWidth() / 2f);
            mRotationPivotY = Math.round(imageDrawable.getIntrinsicHeight() / 2f);
        }
    }
    
    protected void onPullImpl(float scaleOfLayout)
    {
        float angle;
        if (mRotateDrawableWhilePulling)
        {
            angle = scaleOfLayout * 90f;
        }
        else
        {
            angle = Math.max(0f, Math.min(180f, scaleOfLayout * 360f - 180f));
        }
        
        mHeaderImageMatrix.setRotate(angle, mRotationPivotX, mRotationPivotY);
        mHeaderImage.setImageMatrix(mHeaderImageMatrix);
    }
    
    @Override
    protected void refreshingImpl()
    {
        mHeaderImage.startAnimation(mRotateAnimation);
    }
    
    @Override
    protected void resetImpl()
    {
        mHeaderImage.clearAnimation();
        resetImageRotation();
    }
    
    private void resetImageRotation()
    {
        if (null != mHeaderImageMatrix)
        {
            mHeaderImageMatrix.reset();
            mHeaderImage.setImageMatrix(mHeaderImageMatrix);
        }
    }
    
    @Override
    protected void pullToRefreshImpl()
    {
        // NO-OP
    }
    
    @Override
    protected void releaseToRefreshImpl()
    {
        // NO-OP
    }
    
    @Override
    protected int getDefaultDrawableResId()
    {
        return R.drawable.default_ptr_rotate;
    }
    
}
